A Roman Catholic priest whose charges of sexual abuse of a boy were dropped this month has filed a federal lawsuit claiming he was unfairly targeted by police, the city and advocates for sexual abuse victims.

Fr. Xiu Hui "Joseph" Jiang claims in the suit filed Thursday in St. Louis that false abuse accusations were the result of religious and ethnic discrimination. The suit says he was denied due process under the Constitution and defamed by a group that seeks justice for victims of abuse by priests.